<template>
  <div id="app">
    <el-tag
      :key="tag"
      v-for="tag in dynamicTags"
      closable
      :disable-transitions="false"
      @close="handleClose(tag)"
    >
      {{ tag }}
    </el-tag>
    <el-input
      class="input-new-tag"
      v-if="inputVisible"
      v-model="inputValue"
      ref="saveTagInput"
      size="small"
      @keyup.enter.native="handleInputConfirm"
      @blur="handleInputConfirm"
    >
    </el-input>
    <el-button v-else class="button-new-tag" size="small" @click="showInput"
      >+ New Tag</el-button
    >
  </div>
</template>

<script>

export default{
      
        data() {
          return {
            dynamicTags: ["标签一", "标签二", "标签三"],
            inputVisible: false,
            inputValue: "",
          };
        },

        methods: {
          handleClose(tag) {
            this.dynamicTags.splice(this.dynamicTags.indexOf(tag), 1);
          },
      
          showInput() {
            this.inputVisible = true;
            this.$nextTick((_) => {
              this.$refs.saveTagInput.$refs.input.focus();
            });
          },
      
          handleInputConfirm() {
            let inputValue = this.inputValue;
            if (inputValue) {
              this.dynamicTags.push(inputValue);
            }
            this.inputVisible = false;
            this.inputValue = "";
          },
        },
     }
      let Ctor = Vue.extend(data);
      new Ctor().$mount("#app");
</script>

<style>
.el-tag + .el-tag {
  margin-left: 10px;
}
.button-new-tag {
  margin-left: 10px;
  height: 32px;
  line-height: 30px;
  padding-top: 0;
  padding-bottom: 0;
}
.input-new-tag {
  width: 90px;
  margin-left: 10px;
  vertical-align: bottom;
}
</style>
